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41

Flash Light doesn't work

Check Factory Mode

 "Flash Light Check"

YES

NO

End

YES

NO

Update software.

Did the problem fix?

Replace with a new circuit board

Replace with a new Camera module.

Did the problem fix?

NO

End

YES

for KX-PRX150 only

Sensor  doesn't work

(Photometer, Magnetmeter,

Proximity sensor, Accelerometer)

End

YES

NO

Update software.

Did the problem fix?

Replace with a new circuit

board

Magnetmeter is only for KX-PRX150 

WiFi, BT, GPS operation is NG

Clean the antenna contact(WiFi, BT, GPS).

Did the problem fix?

End

YES

NO

Replace a new lower cabinet assy(*)

Did the problem fix?

End

YES

NO

End

YES

NO

Update software.

Did the problem fix?

Replace with a new circuit

board

* WiFi, BT, GPS Antennas are place on the lower cabinet .

GPS is only for KX-PRX150

42

As for battery charge, troubleshooting is described in 9.1.1.2 Check Power (Handset) (P.29)

43

If your unit has below symptoms, follow the instructions in remedy column. Remedies depend on whether you have DECT tester
(*1) or not. 

(*1) A general repair is possible even if you don’t have the DECT tester because it is for confirming the levels, such as Acoustic
level in detail.
(*2) Refer to Check Point (Base Unit) (P.43)

Please follow the items below when BBIC or EEPROM or FLASH is replaced.

After the measuring, suck up the solder of TP.
*: The Setting Method of JIG (Base Unit) (P.53) is required beforehand.
The connections of simulator equipment are as shown in Adjustment Standard (Base Unit) (P.55).

You have DECT Tester. 

(Model Number : CMD60)

Check item (A)-(I),(T).

Check item (A)-(I), (J)-(P),(T).

Check item (A)-(G),(Q),(T).

Check item (A)-(G), (J)-(P), (Q),(T).

-

Check item (J)-(P).

Check item (Q).

Check item (Q).

Check item (Q).

Check item (Q).

Check item (A)-(I), (S).

Check item (A)-(P), (S).

Check item (T).

Check item (T).

Remedy (*2)

Symptom

You don't have DECT Tester.

Items

Check 

Point

Procedure

Check or 

Replace Parts

(A)

3.0 V Supply 
Confirmation

VDD3

1. Confirm that the voltage between test point VDD3 and GND is 2.85 V ± 0.2 V. IC2, C32, C36, 

C86, C88, R91, 

R93, L3, C602, 

C38, R605, 

R607, R608, 
R609, R610, 

R612, Q602

(B)

1.8 V Supply 
Confirmation

VDD1

1. Confirm that the voltage between test point VDD1 and GND is 1.8 V ± 0.02 V.
2. Execute the command “VDD”, then check the current value.
3. Adjust the 1.8V voltage of VDD1 executing command “VDD XX“(XX is the

value).

Q8, C75, C614, 

C61, IC7, R611

(C) Charge Pump 3.0V

Supply Confirmation

VDD5

1. Confirm that the voltage between test point VDD5 and GND is 3.0 V -0.1/+0.3

V. 

IC7,C625

(D) Charge Pump 3.0V

Supply Confirmation

VDD4

1. Confirm that the voltage between test point VDD4 and GND is 3.0 V ± 0.2 V.  IC7,C616, R620

(E)*

BBIC Confirmation

-

1. BBIC Confirmation (Execute the command “getchk”).
2. Confirm the returned checksum value.

Connection of checksum value and program number is shown below.

IC7, X1, R77, 

RA80

(F)* EEPROM Confirmation

-

1. EEP-ROM Confirmation (after you execute the command "sendchar EPD 2"

,and then execute "sendchar EPV").

2. Confirm the returned Value (Value for reference is written at "EEPROM C/

SUM" in Software_Version_Table.xls).

IC7, RA402, 

C51, R657, 

IC401

(G)* BBIC Clock Adjustment

CLK

1. Confirm that the voltage between testpoint VDD4 and GND is less than 1.0 V.
2. Input Command “sendchar sfr”, then you can confirm the current value.
3. Check X’tal Frequency. (10.368 MHz ± 100 Hz).
4. If the frequency is not 10.368MHz ± 100Hz, adjust the frequency of CLK

executing the command “sendchar sfr xx xx (where xx is the value)” so that
the reading of the frequency counter is 10.368000 MHz ± 5 Hz.

X1, IC7, R430, 

C305

checksum value

0A37

program number

DDR1EN

ex.)

44

(H)* Hookswitch Check with 

DC Characteristics

-

1. Connect Telephone Socket to Tel-simulator which is connected with 600 

Ω.

2. Set line voltage to 48 V and line current to 40mA at off-hook condition of

normal telephone.

3. Execute the command “hookoff”
4. Confirm that the line current is 40 mA ± 5 mA.
5. Execute the command “hookon”.
6. Confirm that the line current is less than + 0.8 mA.

P1, Q3, R14, 

R15, Q4, R16, 

R17, D3, 

R18~R24, D21, 

Q5, R27, IC7

(I)

DTMF Generator Check

-

1. Connect Telephone Socket to DTMF tester. (Load=600 

Ω)

2. Link Handset and push dial key.
3. Confirm DTMF character.
4. Confirm that the high Group is -6.0 dBm ~ -10.0 dBm.
5. Confirm that the low Group is -8.5 dBm ~ -12.5 dBm.

IC7, R116, R29, 

C22, Q5, D21

(J)*

Transmitted Power 

Confirmation

-

ANTI_TP

Remove the Antenna before starting step from 1 to 7.

1. Configure the DECT tester (CMD60) as follows;

<Setting>

• Test mode: FP
• Traffic Carrier: 5
• Traffic Slot: 4
• Mode: Loopback
• PMID: 00000
• RF LEVEL = -70 dBm.

2. Execute the command ”sendchar TST”.
3. Execute the command “sendchar dmv 2 2”.
4. Check that “Signalling Status” has been set to “Locked”, then press “ACCEPT

RFPI”.

5. Initiate connection from Dect tester (“set up connect”)
6. Execute the command “ANT1”.
7. Confirm that the NTP value at ANT is 19.0 dBm ~ 25.0 dBm.

IC7,

C802~C806,
C809~C813,
C820, C837,
C822, C823,
C825, C863,
C826, C864,
C851, C853,

DA801, DA802,

L802, L803,

C855~C858,
R806, R807,
R106, R109,

Q9, C617,R71 

(K)*

Modulation Check

-

ANTI_TP

Follow steps 1 to 6 of (J).

7.Confirm that the B-Field Modulation is -350±50/+350±50 kHz/div using data
type Fig31.

IC7,

C802~C806,
C809~C813,
C820, C837,
C822, C823,
C825, C863,
C826, C864,
C851, C853,

DA801, DA802,

L802, L803,

C855~C858,
R806, R807,
R106, R109,

Q9, C617,R71 

(L)* Frequency Offset Check

-

ANTI_TP

Follow steps 1 to 6 of (J).

7.Confirm that the frequency offset is < ± 50 kHz.

IC7,

C802~C806,
C809~C813,
C820, C837,
C822, C823,
C825, C863,
C826, C864,
C851, C853,

DA801, DA802,

L802, L803,

C855~C858,
R806, R807,
R106, R109,

Q9, C617,R71 

(M)*

Frequency Drift 

Confirmation

-

ANTI_TP

Follow steps 1 to 6 of (J).

7.Confirm that the frequency drift is < ± 35 kHz/ms.

IC7,

C802~C806,
C809~C813,
C820, C837,
C822, C823,
C825, C863,
C826, C864,
C851, C853,

DA801, DA802,

L802, L803,

C855~C858,
R806, R807,
R106, R109,

Q9, C617,R71 

Items

Check 

Point

Procedure

Check or 

Replace Parts